The ingenuity of the K.I.S.S. frame lock design is that the secure, safe and strong blade lock serves not only as part of the frame, but also as the handle itself. A thumb stud is used to one-hand open the blade, and as the blade is fully rotated open, the frame lock snaps crisply in behind the blade to guarantee a sound lock up. The blade can be closed with one hand by simply releasing the frame lock. The blade shape is tanto inspired chisel point on the front and flat on the backside so that when the blade is closed onto its handle/frame, the precision fit effectively seals the cutting edge to the frame, even though it's exposed.